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Anonymous
It is not possible to give a sensible answer to this question. The highest common factor (HCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question!
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You need at least two numbers to find a GCF.
HCF(26, 45) = 1. The numbers are co-prime.
The GCF is 15.
The GCF is 5.
15
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